Spraying device



NW0 1, 1938. w. M. VQGEL' 2,134,899

SPRAYING DEVICE Filed Dec. 28, 1937 INVENTCR Malliam {Warizlm WgeL Patented Nov. 1, 1938 UNITED STATES v PATENT OFFICE 3 Claims.

This invention relates to sprayers or atomizers of the character used for insecticides or other liquids intended to be sprayed. The object of the invention is to provide a sprayer of this character of exceptional efficiency; which will be provided with means for preventing clogging of the spray and air blast openings, and which will be provided with means extending around the spray and air-blast openings for distributing the liquid tov be sprayed whereby a dense, finely diffused spray vapor will be emitted from the spray openings. With the improved structure, the possibility of the liquid being ejected in stream-like form will be prevented and many other advantages follow.

In the accompanying drawing, forming a part hereof, Fig. l is a longitudinal section through the front portion of the air chamber, showing the improved nozzle construction; Fig. 2 is a sectional view on the line 2-2 of Fig. 1, looking in the direction of the arrows; and Fig. 3 is a sectional view on the line 33 of Fig. 1, looking in the direction of the arrows.

In the drawing, I indicates the piston chamber of the sprayer, the same being in cylindrical form and generally composed of a rolled-up section of sheet metal having its longitudinal meeting edges seamed together. Mounted for reciprocation within the cylinder I is the piston 2 of conventional construction, the same being fastened to one end of a piston rod 3 which extends out of the rear end of the piston chamber through an opening in a wooden plug 4 located therein. The plug is held in the end of the cylinder I by means of the inwardly formed annular bead or flange 6 on the cylinder end which is pressed into a complementary annular recess formed in the plug. A washer 6 co-operating with the integral lugs I formed on the rod, limits the forward movement of the piston within cylinder l.

The forward end of the cylinder I is closed by a cap-member 9 having its marginal edge seamed to the end of the cylinder I, said cap being provided with a forwardly extending cylindrical cup portion I3 having a front end l4 formed with a centrally located hole or spray opening I5. Secured within the cylindrical portion I3 of the cap member is a cup I0, conforming in shape to the interior of the part I3, but being smaller in size so that an annular chamber 20 is formed between the exterior of the cup I and the inner side of the member I3. The forward end II of the cup I0 is formed with an air blast opening I2 in alignment with the opening I5, the opening l2, however, being somewhat smaller in size than the opening I5.

Located in the chamber 20 between the cup In and the portion I3 of cap 9, is an absorbent material I'6, such as felt or its equivalent, said absorbent material being of cylindrical form to thereby fit within the chamber 20, as shown in the drawing. A siphon tube I! has its upper end connecting with the chamber 20 in which the adsorbent material I 6 is located, said tube extending downwardly through the top of a cylindrical liquid supply tank I8 which is secured to the bottom portion of the piston chamber near the front end thereof. Said tank is filled with insecticide in the conventional manner through a filler opening normally closed by the cap 19.

As the handle 8 is moved back and forth, the piston 2 is reciprocated in the cylinder I, causing an air blast to be forced out of opening I2 in the inner cup member I0, the same causing a fine spray of the liquid with which the absorbent material I6 is saturated, to be ejected out ofthe opening I in a finely diffused mist or spray.

In the insecticide or other liquid sprayed, par.- ticles of foreign matter are sometimes contained which, in the conventional types of sprayers, often clog the air blast and spray openings. When the liquid siphon tube conveys the liquid into a chamber such as that indicated at 20 and located between the openings I2 and I5, which in the embodiment of the invention shown in the drawing contains an absorbent material IS, the liquid is filtered, and dust, dirt or other particles do not reach the openings I2 and I5 to clog the same. The absorbent material in the chamber between the openings also distributes the liquid within the chamber and the vapor or spray delivered through the spray opening I5 is a fine mist of uniform composition.

If desired, the absorbent material may be omitted from the chamber 20, in which event the chamber 2|] will form a distributing passage into which liquid is drawn from the siphon tube I1 and from which it is ejected by the spray action of the air blast.

In the embodiment of the invention shown, the sprayer is of the intermittent type. It will be understood however, that by utilization of the concentric arrangement of piston chamber and air compression chamber and other elements of the sprayer shown in my prior patent, No. 2,054,- 106, dated September th, 1936, an extremely satisfactory type of so-called continuous sprayer, will result, since the nozzle or jet arrangement herein described is ideal for employment in connection with the type of continuous sprayer described in said patent.

What I claim is:

1. A sprayer having an air cylinder provided with a cupped closure cap at one of its ends, said cap being provided with a spray opening, an inner cap disposed within the outer cap and having an opening aligned with that in the outer cap, the caps being spaced apart from one another to form a chamber between them, a liquid supply tank, a communicating means between said supply tank and said chamber, and an absorbent material in said chamber, said absorbent material being disposed to avoid obstructing the openings in the cap.

2. A sprayer having an air chamber, a cap on one end of the same, said cap having a cylindrical protruding end portion, an inner cap within said portion and spaced from the inside of the same whereby a chamber is provided between the inside of said portion and the outer surface of the inner cap, the end of said cylindrical portion and the end of the inner cap having aligned holes, a cylindrical absorbent member in said chamber between the cylindrical portion and the inner cap, and a siphon tube communicating with said absorbent member and with a liquid supply tank.

3. A sprayer having an air tank formed with spaced connected cap members on one of its ends, said cap members having aligned openings, an absorbent material disposed between said cap members and disposed to avoid obstruction of said openings, a liquid supply tank, and a siphon tube connecting the tank with the absorbent material.

WILLIAM MARTIN' VOGEL. 

